var Sonar = /** @class */ (function () {
    function Sonar() {
    }
    Sonar.prototype.ping = function () {
        console.log("Sonar ping!");
    };
    return Sonar;
}());
var Ball = /** @class */ (function () {
    function Ball() {
    }
    Ball.prototype.ping = function () {
        console.log("Ball ping!");
    };
    return Ball;
}());
var C = /** @class */ (function () {
    function C(x, y) {
        this.x = 0;
        this.x = x;
        this.y = y;
    }
    return C;
}());
var c = new C(1, 2);
console.log("c=", c.y);
